Excitatory postsynaptic potential

speed up nerve impulses. (Tortora pg. 407) An axon that is surrounded by myelin sheath, whether in the central nervous system (CNS) or the peripheral nervous system (PNS), is said to be “myelinated”, while the bare axon is “unmyelinated”. Action potentials travel more rapidly and further in distance along a myelinated axon, this is because they travel by salutatory conduction. This is when the impulse at the first node generates currents that open gated channels…

colour change) causes these ion channels to open producing a change in the membrane potential of the receptor cell/s resulting in depolarisation. Once a threshold level of depolarisation is reached, approximately 15mv, the receptor cell stimulates the production of action potentials that are conducted along the membrane of a nerve fibre towards the central nervous system (the brain and spinal cord). An action potential occurs like this: 1. A sensory nerve cell detects a stimulus (e.g. heat,…

I am Thalamus according Scholapedia, am a small part of the brain located between in the middle and the center of the brain and I’m connected to the cerebral cortex and the midbrain thru nerves. I have many functions, but my main function is to regulate the voluntary motor control, the consciousness whether a person is asleep or awake (the sleep cycle), sight, sound, taste, and touch. I’m composed of 3 different groups of cells; the sensory relay cell or nuclei which receive sensation or…

Charcot-Marie-Tooth (CMT) Disease Charcot-Marie-Tooth Disease which is also called CMT. It is said in National Institute of Neurological Disorders and Stroke “That the physicians Jean-Martin Charcot, Pierre Marie, and Howard Henry Tooth. In 1886 Charcot, Marie, and Tooth discovered a group of progressive disorders that affects the peripheral nerves” (NINDS). They still consider this disease to being rare in the United states. The estimated amount of people who are diagnosed is fewer than 175,00…

Instead, potential energy is stored in things like ropes until the catapult is ready to fire, when the energy transfers to the projectile and become kinetic. The three primary energy storage mechanisms are tension, torsion, and gravity. The catapult has proven to…

paper, have you ever wanted to learn about the physics of rollercoasters? This research will explain how potential energy is converted into kinetic energy throughout the roller coaster. Two variations of roller coasters will be built. The roller coasters will be used to compare how the marble’s energy is affected by the hills, turns or loops of each roller coaster. Now let’s test their potential. The concept of a roller coaster can be dated back as far as the 1400’s. According to research, the…

sensitize the nociceptors and stimulate A delta and C fibers, nerves that carry the pain signals. A constant influx of these mediators and enzymes cause the nerves to respond to lower levels of these chemicals, leading to an increased number of action potentials and thus an increased sensation of pain (Chapman, 2010). It has been postulated, “repeated stimulation of peripheral nociceptors produced changes in the dorsal horn neurons of the spinal cord... Epidural analgesia/anesthesia might…

know that based on our motion graphs ball A accelerates to the magnet hitting it so the magnets and balls A-D are recoiled backwards. The ball is also going under energy transformations where when the ball does not start moving it has potential energy then the potential energy is transformed into kinetic…

Selective Serotonin Reuptake Inhibitors (SSRIs) are a class of a drugs that are used to treat psychiatric disorders (Hetirck, et aL. 1). The most common use for SSRIs are for major depressive orders and anxiety. Many Americans commonly use SSRIs to help with moderate to severe symptoms that present in a patient with a mental illness. Due to the beneficial properties found in SSRIs, they are used to treat the brains affected areas, repair nerve damage, and improve overall wellbeing. In simpler…

The skeletal muscle system is made of many skeletal muscle fibers which have at least one neuromuscular junction. A neuromuscular junction is the area of the skeletal muscle fiber that is innervated by a motor neuron (motor nerve). It plays a key role in body movement and breathing along with our nervous system. The synaptic knob, motor end plate, and the synaptic cleft are all key parts of the neuromuscular junction. The synaptic knob of an axon connects with a skeletal muscle fiber to form the…